operators_manual

oil for engine break-in that will be used
during normal operation.
Aftermarket Oil Additive Usage
PACCAR does not recommend the use of
aftermarket oil additives. Today's high-
quality engine lubricating oils are very
sophisticated. Most oils already contain
precise amounts of additives blended into
the lubricating oil to meet stringent
performance requirements.
These oils meet performance
characteristics that conform to the lubricant
industry standards and are suf
ficient
protection when used according to the
recommendations. Aftermarket lubricating
oil additives are not necessary to enhance
engine oil performance and may in some
cases reduce the oil's capability to protect
the engine.
Engine Oil Specifications
Engine oil system specifications.
Engine Oil Specifications for PACCAR MX-11
Oil Pressure at Low Idle (min allowable) 650 -50/+100 rpm 14.5 psi at 239°F (100 kPa at 115°C) oil temperature
At Road Speed 900-1300 rpm (min allowable) 22-33 psi at 239°F (150 -230 kPa at 115°C) oil temperature
At Road Speed 1300-2100 rpm (min allowable) 33 psi at 239°F (230 kPa at 115°C) oil temperature
Regulated Oil Pressure (nominal) 37 psi at 239°F (260 kPa at 115°C) oil temperature
Total System Capacity (oil pan and new oil filters) 38.5 U.S. qts (36.5 liters)
Engine Lubrication and
Filter Intervals
Oil change intervals for normal and severe
duty applications.
Oil drain interval recommendations are
based on vehicle application or engine duty
cycle. PACCAR recommends the use of
high quality lubricating oil as indicated in
the Engine Lubricating Oil
Recommendations and Specifications
section.
Perform these maintenance procedures
according to the Preventive Maintenance
Schedule.
ENGINE MAINTENANCE - Engine Oil Specifications
40 Y53-1166-1G1 (08/2018)
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